Sheet-perforator for printing-presses.



No; 645,264. Patented Mar. l3, I900. H. K. KING.

SHEET PERFORATOR FURPRINTING PRESSES.

(Application filed Jan. 12, 1899.)

(No Model.)

INVENTOH ATTORNEY UNITED STATES PATENT IIOWARD K. KING, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE CHAMBERS BROTHERS COMPANY, OF SAME PLACE.

SHEET-PERFORATOR FOR PRlNTlNG-PRESSES.

SPECIFICATION forming part of Letters Patent No. 645,264, dated March 13, 1900. Application filed January 12, 1899. Serial No. 701,965. (No model.)

To all whom it may concern.-

Be it known that I, HOWARD K. KING, a citizen of the United States, residing in the city and county of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in Devices for Perforating Sheets of Paper in Printing-Presses, of

which the following is a full, clear, and exact vation, partly in section,

description, reference being had to the accompanying drawings, of which Figure l is a transverse section of a printing-press of well-known form having my invention applied thereto. Fig. 2 is a side eleof the same parts of the press. Fig. 3 is a plan view, enlarged, of my punching device, which is shown reduced in Figs. 1 and 2. Fig. 4 is a side elevation of the device. Fig.5 is a section on line 5 5,

Fig.4. Fig. 6 is a section on line 6 6, Fig. Fig. 7 is a section cut from a sheet of paper.

that has been operated upon by the form of the cutting edge of the punching device shown j 4, and 6 of the drawings.

more clearly in'Figs. 3 and 6.

. While useful for other purposes when perforations are required to be made in sheets of paper, the mainor immediate object of this invention is to provide a suitable device for perforating sheets of paper in a printing-press at predetermined points with relation to the printed pages of the sheets, which perforations are designed to be used in connection,

be within the path of the vibration of the points of the pins by means of suitable conveying, stopping, and side guiding or adjusting mechanism, the sheets being then drawn into the required accurate position for the operation of the folding mechanism by the ac tion of the saidpins entering the said perfo- 5o rations up to their larger diameter, which is substantially or approximately equal to that of the perforations.

The precise character of my present invention will clearly appear from the following description and claims.

Referring to the accompanying drawings, which illustrate that form of the device that I have up to this time found to be the most desirable, 1 designates a suitable block for holding the punch or cutting device and adjuncts. The punch consists of a cylindrical pin2, having a sharp cutting edge 3, which, although it may be entirely circular, is in the presentinstance, for a purpose hereinafter explained,notched out at The cutting edge is formed by or at the junction of an external taper of the end portion (in the form of a frustum of a cone) and an internal taper of the wall of a conical concavity in the end of the as clearly seen and indicated in Figs. 3, The body of the pin is screw-threaded and has a longitudinal groove 4:, adapted to be engaged by a feather 5, projecting from the side of a hole or socket 6 7 5 in block 1, into which the pin is entered, as and for a purpose hereinafter explained.

7 is a threaded nut which is screwed onto the pin and when the parts are together in position rests in a socket 8 in the upper part of the block 1, and the feather enters the groove 4.

The height of the pin above the top of the block 1 may be adjusted, as required, by

turning nut 7, which is or may be provided with a slot 9, Fig. 3, for the reception of a suitable sore w-driver,the pin being prevented from rotating by the feather 5. As a convenient means for maintaining the nut and pin in place ment I'employ a binding-screw 10, that is screwed into the block and whose head projects over upon the top of the nut, as clearly shown. Thus while the screw holds the said parts firmly in place they may be readily re- 5 moved when necessary by taking outthe bind ing-screw 10.

In using my cutting device for perforating and against rotative displaceo sheets of paper while being printed in a printing-pressas, for example, a press having a reciprocating type-bed and a rotary-cylinder tympan, such as shown in part in Figs. 1 and 2-I secure the block 1 to the type-bed 11 of the press at the proper prearranged point and position by locking it-the said block-up in the chase with the furniture or by other suit able means. I then adjust the punch vertically by turning the nut '7, first easing up the binding-screw, so that the cutting edge will be a short distance below the plane of the type. As it is necessary that the edge 3 have a body to out against, I secure to'the tympan 12 of the printing-press a counter-plate 13, preferably of brass, that projects a short distance beyond the periphery of the tympan and is located on the tympan at the proper point to register with the punch when the press is operated. The preferred means for thus securing the said plate is to rivet the same to a tape 14 and then paste or glue the latter to the tympan-sheet of the press.

It may sometimes be necessary to change the location of the punch,and consequently of the counter=plate, in the press. By lock ing up the block 1, in which the former is mounted in the chase with the furniture, as mentioned, and attaching the counter-plate to the tympan-sheet with an adhesive the said changes of location may readily and conveniently be made.

While the cutting edge of the punch will always be somewhat below the plane of the top of the type 15, so that the usual inkingrollers may pass over the punch without being cut thereby or inking the latter and so defacing the sheet when being perforated, the pin may be very nicely adjusted by means of a nut 7, so as to just cut through the paper and yet not materially cut into the counter-plate 13.

By making the cutting edge 3 as described and shownthat is, with walls tapering internally and externallya strong yet efficient cutting edge is secured that will last a comparatively-long time.

The object of preferably making the cutting edge with the narrow notch or cut-away'portion 00 is to escape an objection that existed in the employment of a continuous cutting edge in perforating sheets of paper preparatory to being folded by a machine in which my aforesaid automatic pointing or sheet-registering mechanism was embodied. This objection was that the free cuttings or punchings would sometimes lodge between the type and the sheet being printed, and thus mar the printing. By notching out the edge the cutting remains as a tongue 16, attached to the sheet by a narrow connection 16, as seen in Fig. 7, which figure represents part of the printed sheet 17 that has been operated upon by the punch. Thus while the cutting remains undetached from the sheet it does not affect the result of the operation of the pin of the before-mentioned registering mechanism,

which merely pushes aside the tongue 16 as it enters the opening.

I remark that in Fig. 7 the dotted line a a is the line upon which the sheet of paper is to be folded.

Although I have shown and described the cutting edge of my punch as circular in form,

it may be square or of other polygonal outmajor axis of the punch, substantially as and I for the purpose set forth.

2. A punch for cutting circular holes in sheets of paper or the like, whose end is in the form of a frustum of a cone and having a conical concavity therein concentric with said frustum, the sides of which concavity meet the endof the frustum to form a cutting edge, substantially as and for the purpose set forth.

3. In a device of the character and for the purpose set forth, the combination of the block, the screw-threaded punch socketed therein, the nuton said punch, and a binding-screw or the like, for normally maintaining the nut and punch fixedly in position,substantially as and for the purpose described.

4. In a device of the character and for the purpose set forth, the combination of the block, the punch mounted therein, means for adjusting the extent of projection of said cutting edge beyond the surface of the block,- and means for preventingrotative shifting of the punch, substantially as described.

5. In a device of the character'and for the purpose set forth, the combination with the block, the punch, freely mounted'therein and having the notched cutting edge, means for adjusting the extent of projection of said out ting edge above the plane of said block, and

the groove and feather for preventing rotation of the punch, substantially as and for the purpose described.

6. In a device of the character and for the purpose recited, the combination of the block,

the screw-threaded punch freely mounted therein and having the notched-out cutting edge, the adj usting-nut on said punch, and the groove and feather for preventing rotation of the punch, substantially as specified.

7. In a detachablesheet-perforating device of the character described, adapted for use in 5 pasting said tape thereon,

and for the purpose set forth.

In testimony whereof I have hereunto affixed my signature this 4th day of January, A. D. 1899.

HOWARD K. KING.

Witnesses:

WALTER O. PUsEY, JOSHUA PUSEY. 

